package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信登录调用接口
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties properties;
    @Autowired
    private UserMapper userMapper;

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用生成openid的方法
        String openId= getOpenid(userLoginDTO.getCode());

        //判断openid是否为空
        if (openId==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //如果是新用户自动完成注册
        User user=userMapper.getByOpenId(openId);
        if (user==null){
            user=User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回这个用户对象



        return user;
    }

    /**
     * 调用微信接口服务，获取openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
        //调用微信服务接口，获得当前微信用户的openid
        Map<String,String> map=new HashMap<String,String>();
        map.put("appid",properties.getAppid());
        map.put("secret",properties.getSecret());
        map.put("grant_type","authorization_code");
        map.put("js_code",code);
        String json= HttpClientUtil.doGet(WX_LOGIN,map);

        JSONObject jsonObject = JSONObject.parseObject(json);
        String openId=jsonObject.getString("openid");
        return openId;
    }
}
